001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.impl;
018    
019    import java.util.concurrent.atomic.AtomicInteger;
020    
021    import org.apache.camel.spi.CamelContextNameStrategy;
022    
023    /**
024     * A default name strategy which auto assigns a name using a prefix-counter pattern.
025     *
026     * @version 
027     */
028    public class DefaultCamelContextNameStrategy implements CamelContextNameStrategy {
029    
030        private static final AtomicInteger CONTEXT_COUNTER = new AtomicInteger(0);
031        private final String prefix;
032        private String name;
033    
034        public DefaultCamelContextNameStrategy() {
035            this("camel");
036        }
037    
038        public DefaultCamelContextNameStrategy(String prefix) {
039            this.prefix = prefix;
040            this.name = getNextName();
041        }
042    
043        @Override
044        public String getName() {
045            if (name == null) {
046                name = getNextName();
047            }
048            return name;
049        }
050    
051        @Override
052        public String getNextName() {
053            return prefix + "-" + getNextCounter();
054        }
055    
056        @Override
057        public boolean isFixedName() {
058            return false;
059        }
060    
061        public static int getNextCounter() {
062            return CONTEXT_COUNTER.incrementAndGet();
063        }
064    
065        /**
066         * To reset the counter, should only be used for testing purposes.
067         *
068         * @param value the counter value
069         */
070        public static void setCounter(int value) {
071            CONTEXT_COUNTER.set(value);
072        }
073    
074    }